Write a program to perform the friend function in C++?



#include<iostream.h>
#include<conio.h>
class a
{
private:
int i,j;
public:
a()
{
i=10;
j=20;
}
friend void sum(a);
};
void sum(a a1)
{
int s;
s=a1.i+a1.j;
cout<<"after addition result is "<<s;
}
void main()
{
class a a2;
sum(a2);
getch();
}



OUTPUT:-

after addition result is
30

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